Your reply started me thinking that it was a problem with the keyboard, which it is. It won't work on this Dell desktop keyboard. It works perfectly on my Acer laptop.

Thanks.

>>I am trying to enter a null value interactively into a field with CTRL+0. Any reason why it would not work?
>
>I've tried this:
>

CREATE CURSOR zz (aa c(10) null)
>APPEND

>and it worked, BUT only with the ctrl+zero on the alpha part of the keyboard; it won't produce the same effect with the zero in the numeric keypad.